Plug-in air purifier



FIG. 1 is an isometric view of a new plug-in air purifier in accordance with the present invention;

FIG. 2 is a front elevational view of the plug-in air purifier of FIG. 1;

FIG. 3 is a right side elevational view of the plug-in air purifier of FIG. 1, the left side being a mirror image thereof;

FIG. 4 is a top plan view of the plug-in air purifier of FIG. 1;

FIG. 5 is a rear elevational view of the plug-in air purifier of FIG. 1; and,

FIG. 6 is a bottom plan view of the plug-in air purifier of FIG. 1. 

The ornamental design for a plug-in air purifier, as shown and described. 